package demo06;

// 老款手机
public class Phone {
    public void call() {
        System.out.println("打电话");
    }

    public void send() {
        System.out.println("发短信");
    }

    public void show() { // 老款手机只显示来电号码
        System.out.println("显示号码");
    }
}
